作业-python-面向对象编程-使用OOP的思想升级四则运算

# -*- coding:utf-8 -*-
# 3,使用OOP的思想升级四则运算.
class cal():
    def __init__(self,sign,num1,num2):
 self.sign=sign
 self.num1=num1
 self.num2=num2
 def get_result(self):
 if self.sign=='+':
 result=self.num1 + self.num2
 print('%d加%d等于%d'%(self.num1,self.num2,result))
 elif self.sign=='-':
 result = self.num1 - self.num2
 print('%d减%d等于%d' % (self.num1, self.num2, result))
 elif self.sign=='*':
 result = self.num1 * self.num2
 print('%d乘%d等于%d' % (self.num1, self.num2, result))
 elif self.sign=='/':
 result = self.num1 / self.num2
 print('%d除%d等于%d' % (self.num1, self.num2, result))
 return result

a=cal('+',2,3)
a.get_result()

b=cal('-',5,2)
b.get_result()

c=cal('*',3,4)
c.get_result()

d=cal('/',6,3)
d.get_result()